title: Prediction of coronary artery stenosis at rest in patients with normal left ventricular wall motion. Segmental analyses using strain imaging diastolic index.
abstract: Noninvasive detection of coronary artery stenosis usually requires a stress test in patients without left ventricular (LV) regional wall motion abnormalities (RWMA). In contrast, abnormal regional LV relaxation caused by ischemia may persist beyond recovery from transient ischemia. The aim of the present study was to determine whether segmental analysis of abnormal regional LV relaxation using the strain imaging diastolic index (SI-DI) at rest could predict coronary artery stenosis in the three major vessels in patients without LV dysfunction or RWMA. We performed 2D speckle tracking echocardiography and coronary angiography in 85 patients without RWMA with suspected coronary artery disease. Patients with LV dysfunction or acute coronary syndrome were excluded. Echocardiographic images of the LV were obtained in the apical 2-, 3-, and 4-chamber views and divided into 6 segments. In each segment, SI-DI derived from transverse strain imaging was determined. Forty-eight patients had significant coronary artery stenosis (≥ 70%). The optimal cutoff values of SI-DI were 60.5% in the mid anteroseptal segment for detecting left anterior descending artery stenosis (sensitivity, 83.3%; specificity, 81.1%), 60.5% in the basal anterolateral segment for detecting left circumflex artery stenosis (sensitivity, 80.9%; specificity, 90.3%), and 61.5% in the basal inferior segment for detecting right coronary artery stenosis (sensitivity, 74.1%; specificity, 77.8%). A segmental analysis of SI-DI at rest predicted coronary artery stenosis in the three major vessels in patients without RWMA. This noninvasive method may be useful for detecting coronary artery stenosis without a stress test.
authors.affiliation: Department of Cardiology, Juntendo University School of Medicine.
authors.forename: Bei
authors.initials: B
authors.lastname: Yang
authors.forename: Masao
authors.initials: M
authors.lastname: Daimon
authors.forename: Katsuhisa
authors.initials: K
authors.lastname: Ishii
authors.forename: Takayuki
authors.initials: T
authors.lastname: Kawata
authors.forename: Sakiko
authors.initials: S
authors.lastname: Miyazaki
authors.forename: Kuniaki
authors.initials: K
authors.lastname: Hirose
authors.forename: Ryoko
authors.initials: R
authors.lastname: Ichikawa
authors.forename: Shuo-Ju
authors.initials: SJ
authors.lastname: Chiang
authors.forename: Hiromasa
authors.initials: H
authors.lastname: Suzuki
authors.forename: Katsumi
authors.initials: K
authors.lastname: Miyauchi
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Daida
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D023921:Coronary Stenosis / Q000000981:diagnostic imaging* / Q000503:physiopathology; D003971:Diastole; D004452:Echocardiography; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests; D012146:Rest; D016277:Ventricular Function, Left